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Evaluation of hot-fatigue behaviors of EB-PVD gradient thermal barrier coatings
Guo, HB; Gong, SK; Xu, HB
Corresponding AuthorXu, HB()
2002-02-28
Source PublicationMATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN0921-5093
Volume325Issue:1-2Pages:261-269
AbstractGradient thermal barrier coatings (GTBCs) were prepared by co-deposition of a tablet of mixtures of Al-Al2O3-YSZ and Yttria Stabilized Zirconia (YSZ) onto NiCoCrAlY bond coat by means of electron beam physical vapor deposition (EB-PVD). It was found that the microstructure gradually transferred from metallic bond coat to YSZ topcoat and composition distribution changed continuously through the thickness of the coating. The coating exhibited a good resistance not only to high temperature oxidation but also to cyclic corrosion. Thermal cycling tests for the coatings have demonstrated promising results of lifetimes more than 1000 cycles. A finite element method, numerical model, was employed to study the stresses developed in the coating when cooling to 50 degreesC from a stress-free state at 850 degreesC. The results demonstrate that the Al2O3-YSZ graded layer in the GTBC provided a large reduction in stress and stress gradient. Furthermore, the gradient layer is the crucial location that determines the lifetime of the gradient coating. (C) 2002 Elsevier Science B.V. All rights reserved.
Keywordgradient thermal barrier coatings (GTBCs) electron beam physical vapor deposition (EB-PVD) hot-fatigue behaviors finite element analysis (FEA)
Indexed BySCI
Language英语
WOS Research AreaScience & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectNanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000174080600033
PublisherELSEVIER SCIENCE SA
Citation statistics
Cited Times:16[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/126914
Collection中国科学院金属研究所
Corresponding AuthorXu, HB
Affiliation1.Beijing Univ Aeronaut & Astronaut, Coll Mat Sci & Engn, Beijing 100083, Peoples R China
2.Beijing Univ Aeronaut & Astronaut, State Key Lab Corros & Protect, Beijing 100083, Peoples R China
Recommended Citation
GB/T 7714
Guo, HB,Gong, SK,Xu, HB. Evaluation of hot-fatigue behaviors of EB-PVD gradient thermal barrier coatings[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2002,325(1-2):261-269.
APA Guo, HB,Gong, SK,&Xu, HB.(2002).Evaluation of hot-fatigue behaviors of EB-PVD gradient thermal barrier coatings.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,325(1-2),261-269.
MLA Guo, HB,et al."Evaluation of hot-fatigue behaviors of EB-PVD gradient thermal barrier coatings".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 325.1-2(2002):261-269.
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